springcloud微服务架构搭建入门笔记

• 注册管理服务器

  • 　　应用入口配置

@SpringBootApplication
@EnableEurekaServer
public class GatewayApplication {
    public static void main(String[] args) {
        SpringApplication.run(GatewayApplication.class, args);
    }
}

• • yml配置

spring:
  application:
    name: gateway    #服务名称

server:
  port: 8801    #端口

eureka:
  instance:    
    hostname: localhost    
  client:
    registerWithEureka: false
    fetchRegistry: false
    serviceUrl:
      defaultZone: http://${eureka.instance.hostname}:${server.port}/eureka/

• 业务服务器

  • 　　yml配置

server:
  port: 8804

spring:
  application:
    name: client-feign

eureka:
  client:
    service-url:
      defaultZone:  http://localhost:8801/eureka/

• • 应用入口

@SpringBootApplication
@EnableEurekaClient    启动EurekaServer，用于将本服务注册到注册器上
@EnableFeignClients    开启Feign客户端，用于访问注册器上的其他服务
public class ClientFeignApplication {

    public static void main(String[] args) {
        SpringApplication.run(ClientFeignApplication.class, args);
    }

}

• • 外部服务请求客户端

import org.springframework.cloud.openfeign.FeignClient;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.ResponseBody;

@FeignClient("service")    #注册器中注册过的服务名，即其他服务yml中配置的spring.application.name
public interface ClientForRibbon {
    @RequestMapping("/login")    #外部服务请求路径
    @ResponseBody
    String login(@RequestParam("name")String name, @RequestParam("passwd")String passwd);    #参数前需用注解注明参数名称
}

• • 控制层

import com.example.clientfeign.feign.ClientForRibbon;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;


@RestController
public class LoginController {

    @Autowired
    //注入其他服务客户端
    private ClientForRibbon server;

    @RequestMapping("/loginOut")
    public String loginOut(String name,String passwd){
        //利用客户端调用其他服务
        return server.login(name,passwd);
    }
}

demo: https://github.com/malefeng/springcloudDemo.git